Morphology, systematics, and distribution of Meoma ventricosa grandis and M-ventricosa-ventricosa (Echinodermata: Echinoidea: Brissidae) along Mexican coasts
Two subspecies of the genus Meoma are known from the coasts of Mexico, Meoma ventricosa grandis and M. ventricosa s.s. These conspicuous spatangoids, easily recognized by their incomplete subanal fasciole, are confined to the tropical region of the American seas and are thus characteristic of this region. The systematics of M. ventricosa grandis and M. ventricosa s.s. are reviewed. A new northern distribution limit is now recognized for M. ventricosa grandis, extending its range to Magdalena Bay, Baja California Sur, Mexico
